A self-contained interactive video display system. A projector projects a visual image onto a screen for displaying the visual image, wherein the projector projects the visual image onto a back side of the screen for presentation to a user on a front side of the screen. An illuminator illuminates an...http://www.google.de/patents/US20080150913?utm_source=gb-gplus-sharePatent US20080150913 - Computer vision based touch screen
